William p



(N0 Modlel.)

W. -P. MARSTON.

PENCIL SHARPENER. No. 350,260. Patented. 0ct 5, 1886.

iamiamamm UNITED STATES PATENT OFFICE.

PENClL-S HAR PENER.

SPECIFICATION forming part of Letters Patent No. 350,260, dated October 5, 1886.

Application filed April 19, 1886. Serial No. 199,296. (No model.)

To aZZ whom it may concern.-

Be it known that 1, WILLIAM P. MARsTON,

of Toronto, in the Province of Ontario, Do

minion of Canada, have invented a new and useful Improvement in Pencil-Sharpeners, of which the following is a specification, refer ence being had to the annexed drawings, forming apart thereof, in Which Figure l is a plan View of my improved pencil-sharpener. Fig.- 2 is a longitudinal section taken on line a" w in Fig. 1. Fig. 3 is atransverse section taken on line y y in Fig. 1. Fig. 4 is a plan view,partly in section, showing the manner of applying my improved pencilsharpener to a slate-frame.

Similar letters of reference indicate corresponding parts in the different figures of the drawings.

The object ofmy invention is to provide a simple, efficient, and durable pencil-sharpener, more especially designed for sharpening slate-pencils, all ashereinafter fully described, and pointed out in the claim.

In the plate A, of steel or iron, case-hardened, are formed series of slits a, by means of any suitable machinery, and the metal bars I) between the slits are twisted at an angle,

as shown in Fig. 2, so as to present a series of cutting-edges upon which the pencil may be sharpened by placing it at the required angle and moving it longitudinally along the plate and over the edges of the bars I). The mateof sharpening falls through the slits a.

The plate, A, of which the sharpener is formed may be secured in.the slots of binding-strips B, of wood, by means of rivets c, as shown in Figs. 1 and 3; or the plate may be inserted in amortise in the slate-frame G and held therein by the edge of the slate D, and the cutting-surface of the plate may be exposed through a mortise, E, extending through the slateframe, as shown in Fig. 4.

Both sides of myimproved pencil-sharpener are equally efficient. Therefore it is never necessary to turn over the slate.

The mortise in which the plate A is placed, or the strips B, which are attached to the plate, serve to guide the pencil as it is moved back and forth over the sharpener.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

As an improved article of manufacture, a pencil-sharpener consisting of a metal plate having a series of transverse bars bent at an angle to the plane of the plate, the edges of the said bars forming a series of cutting-edges on opposite sides ofthe said plate, as set forth.

WILLIAM P. MARSTON.

Witnesses:

WM. F. ELLIOTT, H. A. KNOWLES.,

rial removed from the pencil in the operation i 

